Or have you wondered what makes one deep cycle battery better than another? If so, this report will answer these questions and give you specific things to check on before buying your new battery (to ensure you get the most bang for the buck)!
When picking a battery (or batteries) for your solar panel system, there are three categories of batteries which work best. We’ll do this in two parts:
Part 1) Quickly compare the three main kinds of solar batteries (lead acid, saltwater, and lithium). And,
Part 2) Assess the components of batteries, such as: depth of discharge, power and capacity, efficiency, battery life, and maker.
By the conclusion of the article you will know just how to pick out the ideal battery to your solar panel system!
So let’s begin…
Part 1) The Three Best Types Of Batteries For Solar Panel Systems: The best type of battery for your solar panel system will depend on what you’re looking for. There are three battery types that work exceptionally well; however, each battery type has pros and cons. So the first decision to make is the type of battery that will fit your system.
Lead Acid Batteries
Lead acid batteries are the most commonly used rechargeable battery in the world. They’re also among the longest-used and most reliable batteries in existence. Compared to the other batteries we’ll discuss in this report; they’re the cheapest option but you exchange price for some battery life and depth of discharge. But for homeowners needing lots of storage for a lower cost, or if you are simply making the transfer to a solar panel system, lead acid batteries may be an excellent option. They’re the type of battery we use in most of the battery banks in our solar panel systems.
Saltwater batteries are more expensive than lead acid batteries, but also have a greater lifespan. Unlike lead acid batteries, saltwater batteries are basically brand new to the industry and stay both somewhat untested and harder to come across. Of the 3 types of batteries, saltwater has the greatest depth of discharge, which means you’ll find the most output per fee before needing to recharge.
Lithium batteries are the most expensive and the longest lasting of the three types of solar batteries. Their depth of discharge is less than that of a saltwater battery, but more than that of a lead acid battery. Comparing all three choices, the lithium ion battery is probably the highest rated, but also the most expensive. An example of a lithium battery is the Tesla Powerwall.
Part 2) Assess the components of batteries. Once you’ve chosen the best battery type for your own solar panel or off-grid system (that meets your system’s needs), there are elements to research to find the ideal battery for your system.
Price is probably one of the more obvious components. But the old saying,”you get what you pay for” holds true when purchasing batteries as well. Sometimes though, certain batteries could be overkill for your system so the most expensive battery may not be the ideal choice always.
Battery Life and Warranty
For many systems, a battery will cycle every day, meaning it is going to charge and drain regularly. With each cycle, the battery’s ability to hold the same charge lessens slightly. So 1 component to consider is the warranty on the battery that guarantees a specific number of cycles of useful life. But bear in mind that if you use the maintenance and reconditioning methods we teach you in the EZ Battery Reconditioning program, you can extend the life of your batteries.
Depth of Discharge
Length of release is how much you can drain the battery down before needing to recharge the battery without damaging its life. Certain solar batteries may be depleted farther than others, allowing for more use between charging. Basically, a battery with a 90% depth of discharge per cycle will provide more battery power per charge compared to a battery with less.
Ability and Power
The more capacity a battery has, the more power it can store. Power is how much energy that a battery can provide at a certain moment. A battery with both a high capacity and high power can run a massive system for many hours; a battery with low capacity and high power can operate a large system but just for a short time.
Efficiency is the amount of energy used compared to the quantity of energy it took to store said energy. Batteries require power to charge and efficacy compares the energy taken to charge a battery with the amount of energy that the charged battery generates.
This may not be a component most would consider, but it’s something to pay attention to. Like other technology, there are both trusted brands and start-up brands. A trusted brand includes known defects and benefits; a start-up brand can perhaps have better technology, but could also have unknown technological issues. Depending on your system demands, you may decide to go with a well-reviewed firm or one that is brand new to the market.